Results 11 to 20 of about 418,870 (216)

Factor analysis of input parameters with the strongest effects on the two phase flow model in an automatic rifle barrel

open access: yesVojnotehnički Glasnik, 2000
The one-factor experiment design has been applied in the analysis of all input parameters occurring in the two phase flow process in automatic rifle barrels. The parameters predominantly influencing input characteristics have been chosen afterwards.
Obrad Čabarkapa
doaj   +1 more source

Toward Super-Resolution Imaging at Green Wavelengths Employing Stratified Metal-Insulator Metamaterials

open access: yesPhotonics, 2015
Metamaterials (MMs) are subwavelength-structured materials that have been rapidly developed in this century and have various potentials to realize novel phenomena, such as negative refraction, cloaking and super-resolution.
Masanobu Iwanaga
doaj   +1 more source

An Efficient Finite-Difference Stencil with High-Order Temporal Accuracy for Scalar Wave Modeling

open access: yesApplied Sciences, 2023
Solving a scalar wave equation by the finite-difference (FD) method is a key step for advanced seismic imaging, in which the numerical accuracy is significantly affected by the FD stencil.
Guiting Chen, Zhenming Peng, Yalin Li
doaj   +1 more source

Complete centered finite difference method for Helmholtz equation [PDF]

open access: yesAnais da Academia Brasileira de Ciências
A new approach in the finite difference framework is developed, which consists of three steps: choosing the dimension of the local approximation subspace, constructing a vector basis for this subspace, and determining the coefficients of the linear ...
GUSTAVO B. ALVAREZ   +2 more
doaj   +1 more source

Study of Model Uncertainties Influence on the Impact Point Dispersion for a Gasodynamicaly Controlled Projectile

open access: yesSensors, 2022
The article presents the analysis of the impact point dispersion reduction using lateral correction thrusters. Two types of control algorithms are used and four sources of uncertainties are taken into account: aerodynamic parameters, thrust curve ...
Mariusz Jacewicz   +3 more
doaj   +1 more source

Infrared Spectroscopic Analysis of Sub-Monolayer Perfluoropolyether Films Based on the —[(CF2)nO]– Monomer Unit for n = 2, 3 and 4

open access: yesTribology Online, 2014
Infrared specular reflection spectra of the TA-30, D-4OH and C4-4OH perfluoropolyether liquid films on gold substrates are simulated and studied experimentally.
Robert J. Waltman
doaj   +1 more source

An Enriched Finite Element Method with Appropriate Interpolation Cover Functions for Transient Wave Propagation Dynamic Problems

open access: yesMathematics, 2022
A novel enriched finite element method (EFEM) was employed to analyze the transient wave propagation problems. In the present method, the traditional finite element approximation was enriched by employing the appropriate interpolation covers.
Jue Qu   +3 more
doaj   +1 more source

Dispersion analysis of the effect of nettle extract on some biochemical and hematological parameters in stress-induced rats

open access: yesБіологічні студії, 2023
Background. The effects of 40% ethanolic nettle extract (the first factor) and adrenaline-induced stress (the second factor) were evaluated, both individually and in combination, on some biochemical and hematological parameters in rats using a two-factor
Oksana Buchko   +3 more
doaj   +1 more source

On the Problem of Politicians’ Image in the Public Consciousness (measurements from 1999–2016)

open access: yesСоциологическая наука и социальная практика, 2018
This article concerns methods of obtaining a view of the correlation in the public consciousness between the images of politicians in the country performing state administrative functions throughout various periods.
Aleksander V. Zhavoronkov
doaj   +1 more source

Simulation Conditions to Compute the Dispersion Diagram of 3D Periodic Structures

open access: yesIEEE Journal of Microwaves
In this work, we examine the methodology for numerically computing the dispersion diagram of three-dimensional periodic structures using commercial electromagnetic simulators.
Hairu Wang   +4 more
doaj   +1 more source

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